The light and period variation of CV Cygni.

Details The light and period variation of CV Cygni. The light and period variation of CV Cygni.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297..364d&link_type=abstract

Astronomy and Astrophysics, v.297, p.364

Astronomy and Astrophysics

Astrophysics

4

Stars: Individual: Cv Cyg, Binaries: Eclipsing

Scientific paper

The U, B and V observations confirmed, once more, after Vetesnik & Perek (1965) that CV Cygni is an eclipsing binary of W UMa type. Due to the variable depth (up to 0.1 magnitude) of one of the minima, the system shifts from A to W-type (or vice versa). The (O-C) diagram of all available times of minima confirms the continous period decrease with a rate dP/dt=~4.44x10^-7^day/yr. The relatively large orbital period (P=~0.98day), the shape of the light and color curves, and the position of the system in the color-period diagram indicate that CV Cyg is an interesting highly evolved contact or near-contact binary which is rapidly evolving into deeper contact through the angular momentum loss from the system.

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